document Github Action workaround (#170)

peter-evans/create-pull-request#48

Author: PatMyron

.github/workflows/template-schema-updater.yaml

@@ -3,7 +3,7 @@ on:
     - cron: '*/5 * * * *'
   workflow_dispatch: # Enables on-demand/manual triggering: https://docs.github.com/en/free-pro-team@latest/actions/managing-workflow-runs/manually-running-a-workflow
 jobs:
-  job:
+  schema-updater:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -37,3 +37,6 @@ jobs:
             https://github.com/aws-cloudformation/aws-cloudformation-template-schema/issues/32
             https://github.com/aws-cloudformation/aws-cloudformation-template-schema/blob/master/docs/tool/instructions.md
             as described in https://github.com/aws-cloudformation/aws-cfn-lint-visual-studio-code/pull/76
+
+            If tests are stuck on https://github.com/peter-evans/create-pull-request/issues/48:
+            ["Manually close pull requests and immediately reopen them. This will enable `on: pull_request` workflows to run and be added as checks."](https://github.com/peter-evans/create-pull-request/blob/master/docs/concepts-guidelines.md#triggering-further-workflow-runs)